Ventilating and cooling structure for motor rotor excitation lead wire

一种电机转子励磁引线内通风冷却结构

Abstract

The utility model discloses a ventilating and cooling structure for a motor rotor excitation lead wire. The ventilating and cooling structure comprises a rotor shaft and an air vent which is perpendicular to the axis of the rotor shaft, the rotor excitation lead wire under the rotor shaft is provide with a groove, the rotor shaft is also provided with a hollow lead wire bolt with radiating fins, and the air vent, the groove and the hollow lead wire bolt from a cooling loop. In the ventilating and cooling structure for the motor rotor excitation lead wire, the air vent which is perpendicular to the axis of the rotor shaft, the groove in the rotor excitation lead wire and the hollow lead wire bolt with the radiating fins form the cooling loop, cooling air can directly cool parts, of the rotor excitation lead wire, which are not liable to dissipate heat, and therefore the cooling effect is substantially improved, and temperature increase is reduced, and the insulting service life of the rotor excitation lead wire is prolonged.
本实用新型公开了一种电机转子励磁引线内通风冷却结构,包括转子轴及垂直于转子轴的轴线上的通风孔,转子轴的下方的转子励磁引线内设有凹槽,转子轴上还设有带有散热片的空心引线螺栓,所述通风孔、凹槽及空心引线螺栓构成冷却风路。本申请转子励磁引线的通风冷却结构通过在转子轴上垂直于轴线的通风孔、转子励磁引线的凹槽、带有散热片的空心引线螺栓形成冷却风路,可使冷却空气直接对转子励磁引线散热较为困难的部位进行冷却,从而显著提高冷却效果,降低温升,转子励磁引线绝缘的使用寿命。

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